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(N0 MmlelA T. L. REED. COVERED ELECTRIC CONDUCTOR.

No. 465,888 Patented Dec. 29. 1891.

mvemon W W xi @aa WITNESSESZ ATTORNEY UNlTED STATES PATENT OFFICE.

THOMAS l.. lildldl'), ()l PROVIDENCE, RllOllF ISLAND.

COVERED ELECTRIC CONDUCTOR.

SPECIFICATION forming part of Letters Patent No. 465,888, dated December29, 1891.

Application filed November 18,1390. Serial No. 371,834. (No model) Toall whom, it may (IO/100171.

Be it known that I, THOMAS L. REED, of l rovidence, in the county ofProvidence and State of Rhode Island, have invented certain new anduseful Improvements in Covered \Vire; and I do'hereby declare that thefol lowing is a full, clear, and exact description Strands are held andcovered on both their inner and outer surfaces by strands braided in theusual way, the object in combining the longitudinal strands with thebraided ones being to avoid the stretchiness, so to braid and which arenot easily detected. It

. .is illustrated in the accompanying drawing.

- Figure 1 is a representation of a piece of wire or cable with theimproved covering, the strands being made wide apart to show theirrelative positions and directions, instead of being drawn closetogether, so as to make a close. covering, as is done in practice. Fig.2 shows a cross-section of the covered wire or cable taken on dottedlines .2, Fig. 1. Fig. $5 is a part of a diagonal section taken acrossbetween two of the threads 0 c on line a: :r, Fig. 1. g

In Fig. 1 one set of the braided strands that run in one directionaround the wire s are marked cc, andthose strands that pass around inthe other directionare marked 0' 0. These two sets are braided over thewire in the usual way. The warp or lengthwise strands (e a are placedintermediate between the two sets of braided strands c 1:, where theycross each otherin the process of braiding. The order of the strands inthe operation is as follows: One of the strands passes, say, first underone of the strands c, with one of the strands a between the two. Thenthe same strand c passes over the next strand v, with another of thestrands a between the two strands, crossing as before, and this order ofthe strands a strand 0 passing altcrnatel y over strands c, with alengthwise strand a between them where they erossis continued throughthe whole covering. By this it will be easily seen that as there isalwaysac strand or a c strand under and over the strands a where theycross the strands a will bestraightin the direction of the length of thewire. This combination has a great advantage over the usual braidedcovering, or even the woven covering, as these straight strands areceive the initial strain of any force exerted on the wires in thedirection of its length and add their strength to that of the wire toresist breaking, and as there are a number of them the additionalStrength thus afforded to the wire is very great.

As before mentioiied, the diagonal position of the usual braided strandsallows them to stretch and prevents them from affording this resistanceto the tensile strain, and a woven covering has its warp-strands bent inand out more or less in passing under and over the filling-thread, whichprevents these warp-strands from being straight and gives them a certainamount of stretch when drawn on lengthwise, and this straight positionof. the lengthwise strands a, not being required tobcnd to accommodatethe braided strands, enables me to use a stiffer, harder, and lessyielding material with greater strength for that purpose.

Even common wire can be used to form the lengthwise strands where'thereis no objection to partially-metallic covering. The number of strands amay be more or less, as it may be found best, as it is riot necessary 10Pllii 0m! heme-(ll crossing of the strands not braidedinclosedbeiween-the two st muds c c. sets of braided strands,substantially as set Having thus descvibqd my improved coverforth.

ing, I claim as my iuvgngiqn THOMAS L. REED. 5 As a new article fmanufacture, a wire for \Vitnesses:

elcctrigal purposes having a covering com- E. B. READ,

posed of braided sttands. and straight wire- BENJ. ARNOLD.

